perf: improve tabs-view scrolling (#4164)

packages/@core/ui-kit/tabs-ui/src/components/tabs-chrome/tabs.vue

@@ -75,7 +75,7 @@ function scrollIntoView() {
       id="tabs-scrollbar"
       class="tabs-chrome__scrollbar h-full"
       horizontal
-      scroll-bar-class="z-10"
+      scroll-bar-class="z-10 hidden"
     >
       <!-- footer -> 4px -->
       <div

packages/@core/ui-kit/tabs-ui/src/components/tabs/tabs.vue

@@ -72,12 +72,12 @@ function scrollIntoView() {
 </script>
 
 <template>
-  <div class="h-full flex-1 overflow-hidden">
+  <div class="size-full flex-1 overflow-hidden">
     <VbenScrollbar
       id="tabs-scrollbar"
       class="tabs-scrollbar h-full"
       horizontal
-      scroll-bar-class="z-10"
+      scroll-bar-class="z-10 hidden"
     >
       <div
         :class="contentClass"

packages/@core/ui-kit/tabs-ui/src/tabs-view.vue

@@ -7,8 +7,10 @@ import type { TabsProps } from './types';
 import { nextTick, onMounted, onUnmounted, ref, watch } from 'vue';
 
 import { useForwardPropsEmits, useSortable } from '@vben-core/composables';
+import { ChevronLeft, ChevronRight } from '@vben-core/icons';
 
 import { Tabs, TabsChrome } from './components';
+import { useTabsViewScroll } from './use-tabs-view-scroll';
 
 interface Props extends TabsProps {}
 
@@ -30,6 +32,8 @@ const emit = defineEmits<{
 
 const forward = useForwardPropsEmits(props, emit);
 
+const { initScrollbar, scrollDirection } = useTabsViewScroll();
+
 const sortableInstance = ref<null | Sortable>(null);
 
 // 可能会找到拖拽的子元素，这里需要确保拖拽的dom时tab元素
@@ -104,13 +108,21 @@ async function initTabsSortable() {
   sortableInstance.value = await initializeSortable();
 }
 
-onMounted(initTabsSortable);
+async function init() {
+  await nextTick();
+  initTabsSortable();
+  initScrollbar();
+}
+
+onMounted(() => {
+  init();
+});
 
 watch(
   () => props.styleType,
   () => {
     sortableInstance.value?.destroy();
-    initTabsSortable();
+    init();
   },
 );
 
@@ -120,6 +132,32 @@ onUnmounted(() => {
 </script>
 
 <template>
-  <TabsChrome v-if="styleType === 'chrome'" v-bind="forward" />
-  <Tabs v-else v-bind="forward" />
+  <div
+    :class="{
+      'overflow-hidden': styleType !== 'chrome',
+    }"
+    class="flex h-full flex-1"
+  >
+    <!-- 左侧滚动按钮 -->
+    <span
+      class="hover:bg-muted text-muted-foreground cursor-pointer border-r px-2"
+      @click="scrollDirection('left')"
+    >
+      <ChevronLeft class="size-4 h-full" />
+    </span>
+
+    <TabsChrome
+      v-if="styleType === 'chrome'"
+      v-bind="{ ...forward, ...$attrs, ...$props }"
+    />
+    <Tabs v-else v-bind="{ ...forward, ...$attrs, ...$props }" />
+
+    <!-- 左侧滚动按钮 -->
+    <span
+      class="hover:bg-muted text-muted-foreground cursor-pointer border-l px-2"
+      @click="scrollDirection('right')"
+    >
+      <ChevronRight class="size-4 h-full" />
+    </span>
+  </div>
 </template>

packages/@core/ui-kit/tabs-ui/src/use-tabs-view-scroll.ts

@@ -0,0 +1,59 @@
+import { nextTick, ref } from 'vue';
+
+type El = Element | null | undefined;
+
+export function useTabsViewScroll(scrollDistance: number = 150) {
+  const scrollbarEl = ref<El>(null);
+  const scrollViewportEl = ref<El>(null);
+
+  function getScrollClientWidth() {
+    if (!scrollbarEl.value || !scrollViewportEl.value) return {};
+
+    const scrollbarWidth = scrollbarEl.value.clientWidth;
+    const scrollViewWidth = scrollViewportEl.value.clientWidth;
+
+    return {
+      scrollbarWidth,
+      scrollViewWidth,
+    };
+  }
+
+  function scrollDirection(
+    direction: 'left' | 'right',
+    distance: number = scrollDistance,
+  ) {
+    const { scrollbarWidth, scrollViewWidth } = getScrollClientWidth();
+
+    if (!scrollbarWidth || !scrollViewWidth) return;
+
+    if (scrollbarWidth > scrollViewWidth) return;
+
+    scrollViewportEl.value?.scrollBy({
+      behavior: 'smooth',
+      left:
+        direction === 'left'
+          ? -(scrollbarWidth - distance)
+          : +(scrollbarWidth - distance),
+    });
+  }
+
+  async function initScrollbar() {
+    await nextTick();
+    const barEl = document.querySelector('#tabs-scrollbar');
+
+    const viewportEl = barEl?.querySelector(
+      'div[data-radix-scroll-area-viewport]',
+    );
+
+    scrollbarEl.value = barEl;
+    scrollViewportEl.value = viewportEl;
+
+    const activeItem = viewportEl?.querySelector('.is-active');
+    activeItem?.scrollIntoView({ behavior: 'smooth', block: 'start' });
+  }
+
+  return {
+    initScrollbar,
+    scrollDirection,
+  };
+}